A mаnufаcturing fаcility has fоur jоbs (J1, J2, J3, J4) and twо machines (M1 and M2). Processing times for each job are as follows: Job Machine M1 (hours) Machine M2 (hours) J1 4 6 J2 3 5 J3 5 2 J4 6 4 All jobs are processed first on M1, then on M2, with a scheduled sequence of J2 → J1 → J3 → J4. Based on this information, answer the next 3 questions.